What is The primary muscles involved in torticollis?

The primary muscles involved in torticollis are the sternocleidomastoid muscles, which are located on either side of the neck. When one of these muscles is contracted or shortened, it can cause the head to tilt to one side and rotate to the opposite side. Other muscles that may be affected include the trapezius and splenius capitis, which can also contribute to neck movement and positioning in individuals with torticollis.